Posted by Janet Baraclough on March 27, 2006, 10:43 am
> > > That's a different issue, because dairy farmers have to keep the milk
> > > of recently-medicated cows out of the processing system. It doesn't, or
> > > should not, enter the food chain.
> > That's interesting, thanks. But I was thinking of/wondering about any
> > kind of obligatory vaccination, perhaps. Does such a requirement
> > exist, do you know?
M says cattle are routinely vaccinated against respiratory diseases.
> > Is there any indication of how long it takes such chemicals to become
> > harmless when stored in rotting manure?! Kate has certainly raised a
> > very important point there, it seems to me.
> Istr OP's are pretty persistent. I'll ask if he knows.
He doesn't know about persistence in manure.
Janet
Posted by Sacha on March 27, 2006, 11:32 am
Janet Baraclough wrote:
> > > > That's a different issue, because dairy farmers have to keep the milk
> > > > of recently-medicated cows out of the processing system. It doesn't, or
> > > > should not, enter the food chain.
> > > That's interesting, thanks. But I was thinking of/wondering about any
> > > kind of obligatory vaccination, perhaps. Does such a requirement
> > > exist, do you know?
> M says cattle are routinely vaccinated against respiratory diseases.
> > > Is there any indication of how long it takes such chemicals to become
> > > harmless when stored in rotting manure?! Kate has certainly raised a
> > > very important point there, it seems to me.
> > Istr OP's are pretty persistent. I'll ask if he knows.
> He doesn't know about persistence in manure.
Thanks, Janet. I think anyone wanting to use cow manure on veg patches
might want to find out exactly what the vaccine consists of and how
long it takes to 'disappear'. Perhaps DEFRA could help. Cough.
--
Sacha
www.hillhousenursery.co.uk
South Devon
Posted by Mike Lyle on March 27, 2006, 2:47 pm
Sacha wrote:
[...]
> Thanks, Janet. I think anyone wanting to use cow manure on veg patches
> might want to find out exactly what the vaccine consists of and how
> long it takes to 'disappear'. Perhaps DEFRA could help. Cough.
Vaccination works by stimulating the production of antibodies in the
bloodstream, so I can't see what harm it could do even if some of these
antibodies had got into the dung. It's completely different from
chemicals, such as worm-killers, intended to operate through the gut.
--
Mike.
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> > > of recently-medicated cows out of the processing system. It doesn't, or
> > > should not, enter the food chain.
> > That's interesting, thanks. But I was thinking of/wondering about any
> > kind of obligatory vaccination, perhaps. Does such a requirement
> > exist, do you know?